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GGill31 Visualforce Error - Apex
Hi There,
I'm trying to input multiple Barcode_ID's for given Item object for a given employee. The visualforce page requires an employee to input their Employee_ID and enter multiple Barcode_ID's (taking in multiple keyboard keys until enter is hit for every barcode id). The Borrow Object has lookup relationship with Employee and Item objects on Employee_ID and Item_ID autonumber fields from Employee and Item object respectively. On executing the following code, its giving me the following error
'System.NullPointerException: Attempt to de-reference a null object'
Error is in expression '{!insertRecord}' in component <apex:commandButton> in page checkoutitems: Class.BorrowController.createBorrowRecord: line 10, column 1
Class.BorrowController.insertRecord: line 38, column 1
This is my code:
Visualforce page - Checkout.vfp
<apex:page controller="BorrowController" showHeader="false" applyHtmlTag="false" applyBodyTag="false" docType="html-5.0">
<html>
<head>
<body>
<apex:pageBlock >
<apex:pageBlockSection >
<label for = "employeeIDText">Employee ID: </label>
<input type = "text" id = "employeeIDText" value = "{!employee_ID}"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<label for = "inputText">Barcode ID:</label>
<input type = "text" id = "inputText"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<span id = "outputText"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<span id="addedItems"/>
<br />
<input type = "hidden" id = "hiddenItems" value = "{!barcodeList}"/>
</apex:pageBlockSection>
</apex:pageBlock>
<apex:form >
<apex:commandButton action="{!insertRecord}" value="Checkout" id="checkoutBtn">
</apex:commandButton>
</apex:form>
</body>
<script type = "text/javascript">
var inputText = document.getElementById("inputText");
var completeText = "";
var arrayItems = [];
var items = "";
var hiddenItems = document.getElementById("hiddenItems");
inputText.addEventListener("keydown", function(e) {
console.log("Inside Event");
if(e.which!=13) {
if(e.which >= 48 && e.which <= 57 || e.which >= 65 && e.which <= 90) {
console.log("Inside If-Block");
completeText = completeText + e.key;
}
else {
console.log("Invalid Key");
outputText.innerHTML = "Invalid Key Pressed";
inputText.value = "";
}
}
else {
arrayItems.push(completeText);
items = items + completeText + ",";
addedItems.innerHTML = items;
hiddenItems.value = items;
console.log("Inside Else-Block");
outputText.innerHTML = completeText;
inputText.value = "";
completeText = "";
}
console.log("Item Elements:");
for(var i = 0; i < arrayItems.length; i++) {
console.log(i+": "+arrayItems[i]);
}
});
</script>
</head>
</html>
</apex:page>
Controller - BorrowController.apex
public class BorrowController {
public String employee_ID {get; set;}
public String borrow_ID {get; set;}
public String barcodeList{get; set;}
public BorrowController() {}
public void createBorrowRecord() {
List<String> barcodeItems = barcodeList.split(',');
System.debug('barcodeItems:'+barcodeItems);
List<Item__c> itemList = new List<Item__c>();
for(Integer i = 0; i < barcodeItems.size(); i++) {
System.debug('Inside for loop');
itemList = [SELECT Name, Item_ID__c, Price__c, Status__c FROM Item__c WHERE Barcode_ID__c =: barcodeItems[i]];
}
for(Item__c item: itemList) {
if(item != null) {
Borrow__c b = new Borrow__c();
System.debug('Borrow Item initialised');
b.Employee_ID__c = employee_ID;
b.Item_ID__c = item.Item_ID__c;
b.Barcode_ID__c = item.Barcode_ID__c;
b.Item_Price__c = item.Price__c;
borrow_ID = b.Borrow_ID__c;
System.debug(b.Employee_ID__c +', '+b.Item_ID__c+', '+b.Barcode_ID__c+', '+b.Item_Price__c+', '+borrow_ID);
insert b;
}
}
}
public PageReference insertRecord() {
System.debug('Inside Page Reference: insertRecord()');
createBorrowRecord();
return new PageReference('/'+ borrow_ID);
}
}
Its also giving me a StringException for Employee_ID and Item_ID while inserting in Borrow object. The Employee_ID and Item_ID in respective objects are autonumber field beginning with E-{0001} and I-{0001}. My requirement is to get the user entered Barcode_ID's with Item's Barcode_ID to get information about other fields of Item object, and if its a match and corresponding item record is found, it should create a borrow object record. I'm unsure if the field values from form are correctly passed to the controller or not. I don't know how to pass these field values to the controller.
Any help would be greatly appreciated.
Thanks and Regards,
Gill
I'm trying to input multiple Barcode_ID's for given Item object for a given employee. The visualforce page requires an employee to input their Employee_ID and enter multiple Barcode_ID's (taking in multiple keyboard keys until enter is hit for every barcode id). The Borrow Object has lookup relationship with Employee and Item objects on Employee_ID and Item_ID autonumber fields from Employee and Item object respectively. On executing the following code, its giving me the following error
'System.NullPointerException: Attempt to de-reference a null object'
Error is in expression '{!insertRecord}' in component <apex:commandButton> in page checkoutitems: Class.BorrowController.createBorrowRecord: line 10, column 1
Class.BorrowController.insertRecord: line 38, column 1
This is my code:
Visualforce page - Checkout.vfp
<apex:page controller="BorrowController" showHeader="false" applyHtmlTag="false" applyBodyTag="false" docType="html-5.0">
<html>
<head>
<body>
<apex:pageBlock >
<apex:pageBlockSection >
<label for = "employeeIDText">Employee ID: </label>
<input type = "text" id = "employeeIDText" value = "{!employee_ID}"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<label for = "inputText">Barcode ID:</label>
<input type = "text" id = "inputText"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<span id = "outputText"/>
</apex:pageBlockSection>
<apex:pageBlockSection >
<span id="addedItems"/>
<br />
<input type = "hidden" id = "hiddenItems" value = "{!barcodeList}"/>
</apex:pageBlockSection>
</apex:pageBlock>
<apex:form >
<apex:commandButton action="{!insertRecord}" value="Checkout" id="checkoutBtn">
</apex:commandButton>
</apex:form>
</body>
<script type = "text/javascript">
var inputText = document.getElementById("inputText");
var completeText = "";
var arrayItems = [];
var items = "";
var hiddenItems = document.getElementById("hiddenItems");
inputText.addEventListener("keydown", function(e) {
console.log("Inside Event");
if(e.which!=13) {
if(e.which >= 48 && e.which <= 57 || e.which >= 65 && e.which <= 90) {
console.log("Inside If-Block");
completeText = completeText + e.key;
}
else {
console.log("Invalid Key");
outputText.innerHTML = "Invalid Key Pressed";
inputText.value = "";
}
}
else {
arrayItems.push(completeText);
items = items + completeText + ",";
addedItems.innerHTML = items;
hiddenItems.value = items;
console.log("Inside Else-Block");
outputText.innerHTML = completeText;
inputText.value = "";
completeText = "";
}
console.log("Item Elements:");
for(var i = 0; i < arrayItems.length; i++) {
console.log(i+": "+arrayItems[i]);
}
});
</script>
</head>
</html>
</apex:page>
Controller - BorrowController.apex
public class BorrowController {
public String employee_ID {get; set;}
public String borrow_ID {get; set;}
public String barcodeList{get; set;}
public BorrowController() {}
public void createBorrowRecord() {
List<String> barcodeItems = barcodeList.split(',');
System.debug('barcodeItems:'+barcodeItems);
List<Item__c> itemList = new List<Item__c>();
for(Integer i = 0; i < barcodeItems.size(); i++) {
System.debug('Inside for loop');
itemList = [SELECT Name, Item_ID__c, Price__c, Status__c FROM Item__c WHERE Barcode_ID__c =: barcodeItems[i]];
}
for(Item__c item: itemList) {
if(item != null) {
Borrow__c b = new Borrow__c();
System.debug('Borrow Item initialised');
b.Employee_ID__c = employee_ID;
b.Item_ID__c = item.Item_ID__c;
b.Barcode_ID__c = item.Barcode_ID__c;
b.Item_Price__c = item.Price__c;
borrow_ID = b.Borrow_ID__c;
System.debug(b.Employee_ID__c +', '+b.Item_ID__c+', '+b.Barcode_ID__c+', '+b.Item_Price__c+', '+borrow_ID);
insert b;
}
}
}
public PageReference insertRecord() {
System.debug('Inside Page Reference: insertRecord()');
createBorrowRecord();
return new PageReference('/'+ borrow_ID);
}
}
Its also giving me a StringException for Employee_ID and Item_ID while inserting in Borrow object. The Employee_ID and Item_ID in respective objects are autonumber field beginning with E-{0001} and I-{0001}. My requirement is to get the user entered Barcode_ID's with Item's Barcode_ID to get information about other fields of Item object, and if its a match and corresponding item record is found, it should create a borrow object record. I'm unsure if the field values from form are correctly passed to the controller or not. I don't know how to pass these field values to the controller.
Any help would be greatly appreciated.
Thanks and Regards,
Gill